Remote control device



March 6, 1934. J. R. HAVILAND 1,950,143

REMOTE CONTROL DEVICE Filed Oct. 21, 1929 My %MQMMM Patented Mar. 6,1934 UNITED STATES PATENT OFFICE REMOTE CONTROL mzvros ApplicationOctober 21, 1929, Serial 160,401,334

1 Claim.

This invention relates to remote control devices.

In radio receiving and transmitting apparatus of the type used inairplanes, for example, where the set is placed at a-considerabledistance from the operator, a remote control mechanism actuated by theoperator is provided for moving the tuning element of the set inadjusted position with respect to marks on a dial which indicate thewave length at which it is desired to receive or send signals.

The object of this invention is to provide a remote control arrangementof this character which will be efiicient in operation, cheap tomanufacture and wherein the tuning element is moved in adjusted positionin a simple and positive manner.

According to this invention, the operation of a gearing mechanismthrough the movement of a manual operating knob is effective to move awiper on a row of associated contacts for controlling the operation of amotor placed at the remote end of the control. In this motor thesuccessive energization of a series of electromagnets is efiective tocause the rotation of an armature wheel to which the tuning element ofthe set is operatively connected. Means is provided for automaticallydisconnecting the operating knob from the gear actuating mechanism andfor simultaneously breaking the motors operating circuit upon therelease of the knob when the tuning element of the set reaches itsadjusted position, and a dial movable under control of the actuatingmechanism indicates the wave length to which the radio set is tuned.

Fig. 1 is a side view of the controlling mecha-- nism showing a numberof operating parts in section;

Fig. 2 is a sectional view taken approximately on line 2-2 of Fig. 1;and

Fig. 3 is a perspective view of the tuning element showing the motorgeared to the condenser shaft;

Fig. 4 is a diagrammatical view of the motor and its operating circuit.

In Figs. 1 and 2, 10 indicates a panel on which the plates 11 and 12 aresecured by a. number of studs such as 13 and 14, the studs 14cooperating with studs 9 for supporting a plate 28 provided for apurpose that will be hereinafter described in detail. In the plate 10there is mounted a bushing 15 in which the shaft 16 is mounted. Thisshaft carries at one end an actuating knob 1'7 and the other end engagesa sleeve 18 journaled in the plates 11 and 12. The shaft 16 is providedat its inner end with a clutch portion 19 for engagement with a pin 20extending across the sleeve 18 upon an axial movement of shaft 16against the resistance of a spring 21 having one end abutting against acollar 22 and the other end against the shoulder portion of 55 sleeve18, collar 22 being secured on the shaft 16 by a pin 23.

The sleeve 18 carries a gear 24 which meshes with a pinion 25 mounted onone end of a shaft 26 journaled in plate 12 and in a bearing 27 in 5 theinsulating plate 28. On this shaft is mounted a slip ring 52 which isengaged by a brush 51 mounted on the plate 12. The shaft 26 carries awiper 29 arranged to successively engage a circular row of associatedcontact members, such as 73 30, 31, 32, etc. shown in Figs. 1, 2 and 4provided for a; purpose that will be hereinafter described in detail. 1

As shown in Figs. 3 and 4 the motor M which is placed at a remote pointfrom the control con- 7-5 sists of a toothed armature wheel 40 arrangedto be energized by a series of staggered magnets 41, 42 and 43. Thesemagnets are connected to the contact members 30, 31 and 32 through theline wires 44, 45 and 46 and through wiper 29, the g slip ring 52, brush51 and the lead 50 to one side of battery 49, the other side of themagnet circuit extending through a common line wire 4'7, the springs 43and 58 to the other side of battery 49. 1:,

The armature wheel 40 carries a pinion 8 which meshes with a gear 71keyed on shaft 72 to which the tuning element TE of the radio set isoperatively connected.

The springs 48 and 58 are mounted in a pile-up 9Q arrangement with acontact actuating member 60 on the lower end of plate 11, as shown inFigs. 1 and 2. Member 60 extends in operable relation with the collar 22on shaft 16, the axial movement of this shaft being effective to engagethe springs 48 and 58 and simultaneously engage the clutch portion 19with the pin 20 for operatively connecting the wiper 29 with knob 17.

The sleeve 18 has a gear toothed portion 61 engaging a gear 62 keyed ona shaft 63. This shaft is journaled in plates 11 and 12 and can'ies atone end a dial 64 which cooperates with a hair line marked on a glasswindow 10' mounted on the panel 10 for translating the movement of thetuning element TE into the wave length of the 5 radio signals.

In this device in order to decrease the number of turns of knob 17 withrespect to the movement of armature wheel 40, the line wires 44,

45 and 46 are multlpled by conductors such as the magnet 43.

'15 and 77 to a number of contacts 41', w and as shown in Fig. 4.

In operation, the axial movement of knob 17 against the resistance ofspring 21 is effective to engage the contact springs 48 and 58 forclosing the motors operating circuit and to engage the clutch portion19'on shaft 16 with the pin 20 for operatively connecting the wiper 29with knob 1'7. The movement of wiper 29 in the direction indicated bythe arrow in Fig. 4 will first cause the energization of magnet 43through a circuit extending from one side of battery 49, conductor 50,the crush 51, the slip ring 52, the wiper 29, contact 32. the line wire46, the winding of magnet 43, the common line wire 47, the springs 48and 58 closed to the other side of battery 49. The energization of thismagnet is effective to rotate the armature wheel 40 in a clockwisedirection uniil the tooth M1 coincides with The movement of wiper 29 oncontact 31 is effective to energize magnet 42 which causes the continuedmovement of wheel 40 until the tooth M2 coincides with the position ofthis magnet, which movement will position the tooth M3 in position to beattracted by magnet ilupon the passing of the wiper 29 on contact 30,the continued movement of wiper 29 on contacts 46, 44' and 41 beingeffective to cause the successive energization of these magnets in theorder above mentioned through the loop wires 77, 75 and 76.

Similarly the movement of wiper 29 in the direction opposite to thatindicated by the arrow is effective to cause the movement of thearmature wheel 40 in a, counterclockwise direction, which permits theadjustment of the tuning element TE in either direction.

What is claimed is:

In a switch for the control of an electric m0- tor, said switchcomprising a circular row of stationary contacts, a slip ring, astationary wiper engaging said slip ring, a wiper movable for successively engaging said contacts, a speed-up driving mechanism for saidslip ring and said wiper, a normally inefiective manually operablemember for actuating said mechanism, a. clutch device to render saidmember effective upon the axial movement of one element of said devicefor operating said mechanism, and means for automatically disengagingsaid clutch device upon the release of said operable member to render itineffective with respect to said mechanism.

JOHN R. HAVILAND.

